Sewing-machine.



L. ONDERDO'N'K.

SEWING ISZIAGIEIIBIE.- APPLICATION FILED SEPT. 10,1907.

1,1 29,592, Patented Feb. 23, 1915.

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SEWING MACHINE. APPLICATION IIILED SEPT. 10,1907.

1,1 29,592. I I Patented Fb. 23, 1915.

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L. ONDERDONK.

SEWING MACHINE.

APPLICATION FILED SEPT. 10, 1907 Patented Feb. 23, 1915.

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LANSING ONDERDONK, OF NEW YORK, N. Y., ASSIGNOR T O UNION SPECIALMACHINE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

SEWING-MACHINE.

Specifieation'of Letters Patent. PatentedFeb. 23, 1915.

Application filed September 10, 1907. Serial No. 392,211.

To all whom itmag concern:

Be it known that I, LANSING ONDERDONK,-

a citizen of the United States, residing at New York,-in the county ofNew York, State stitchsewing machine, wherein ,the stitch is formed andpracticallyfinished for each reciprocation of the needle bar.

A further object of my invention is to providea sewing machine of theabove character, wherein the-looper receives practically all itsmovements While the needle is on its up stroke. I v v A still furtherobject-of my invention is toprovide a stitch-forming inech'anism,wherein the looper thread is transferred to a thread retainer, and thelooper returned to its extreme backward position, while the needle is onits up stroke.

These and other objects will in part be obvious, and in. part behereinafter more fully described. I In the drawings which by way ofillustration, show one embodiment of my invention,-Figure 1 is'a frontplan view, showing a sewing machine embodying my improvement, theworksupport beingremoved to expose the looper-operating mechanism;

Fig. 2 is a top plan "view of a machine embodying my improvements thefeeding mechanism being broken away for the sake of clearness; Fig. 3 isa sectional detail view, showing the feeding mechanism and the loopermechanism; Fig. 4 is a similar view with the needle in a differentposition; Fig. 5 is a detail showing in side elevation, the. means forvibrating the thread retainer; and Fig. 6 is a detail View, showing the'rock arms for oscillating the looper. Fig. 7 is a side view of the partsshown in F 6.

The bed plate 1 has rising therefrom an overhanging arm 2, carrying lugsat the forward end in which reciprocate a needle bar 3. The needle bar 3carries a needle-latiits.

lower end and receives its reciprocation from 5 5 receives itsoscillation from an eccentric The lever 5 is connected to the strap 7,which cooperates with an eccentric 8 on the main shaft 9. Said mainshaft is rotated by a belt wheel 10, or any-other suitable means. Alooper 11 is secured to an arm 12 by means of ascrew 13. Theloopercarrying arm 12 is pivoted at 14 to a stud 15,1which is secured toa collar on the loopersupporting shaft 16. The looper-carrying arm 12 isprovided with a'ball stud 17, which is engaged by a link 18, which ispivoted at its opposite end to a-stud 19 carried by a rock lever 20. Therock lever 20 is pivotally connected to a fulcrum stud 21, secured a tothe arm 2 of the machine. The rock lever 20 is provided with a secondarm-22 (see Fig. 2). The arm '22 has a collar formed integral therewith,to which the arm, 20 is clamped by means of a set screw 23, so that thetwo arms 20 and 22 move together about the fulcrum stud 21. The arm'22is connected to a rock lever 24, by means of a link 25, which point 26.The other arm 27 of the rock lever 24 is slotted, and provided with anadjustable stud 28. The stud 28 is connected to an eccentric strap29fwhioh-co6perates with an eccentric 30' on the main shaft 9. -A feeddog 31 is carried by the feed bar 32, which is pivoted'to a rockingframe33. The rocking frame 33 receives its movement from a crank disk,34' onthe end of the shaft 9 in means of a screw 36. The outer end of the arm35 is forked (see Figs. 3 and 4), and engages a cam 37 secured to theshaft 9. As the shaft 9 is rotated, the looper support 16 is oscillatedto give the looper carried by said support its needle-avoiding movement.Also as the shaft 9 rotates, the eccentric 3B rocks the lever 24, whichin turn rocks the lever arms 22 and 20, and through the link 18oscillates the looper back and forth in the direction of its length.

The thread retainer 38 is mounted in an arm 39, which is pivotallymounted upon a stud 40. The stud 40 is mounted in a split collar 41,carried on an arm 42, which is clamped by means of a screw 43 to a post44, rising from the bed plate. The arm 39 at its rear end carries a ballstud 45, which is engaged by a link 46. The link 46 at its opposite endengages a ball stud 47, carried on the outer end of the arm 48. The armThe looper support 16 48 is provided with an offset member 49, andbetween the arm 48 and the member 49 rotates a cam 50 carried bythe mainshaft 9 of the machine. As the main shaft rotates, the arm i8 isvibrated up-and down,

lever 24: is rocked, said pivotal connectionmoves from the position atthe left of a line connecting thefulcrum of the rocklever 24, and thepivotal connection of the link 25,

to'tlie arm 22, to a position slightly at the right of said line. Theresult of this position of the parts is that the looper on its return"stroke moves rapidly out of the needle loop and the speed of the loopergradiually f decreases until the. pivotal connection abovereferredto,reaches the line also referred to, at which time the movement of thelooper ceases.

The movement of this pivotal connection to the right of said line,

as viewed in Fig. 1, gives little or no movement with the looper.

The operation of themachine is as follows: Starting with the needle atthe lower end ofits stroke, and the looper is at this time in itsretracted position, just beginning its forward stroke, as the needlerises the usualneedle loop is thrown out, which 'is entered very quicklyby the looper, which passes on to the end of its stroke, reaching thesame practically by the time the eye of the needle reaches the uppersurface of the material. The looper is now moved laterallyby the cam-37and the thread retainer 38 moves up into the looper thread loop. Thelooper immediately begins its backwardv oscillation, and by the time theneedle reaches the upper end of its stroke, said looper pract'icallyreaches the rear end of its stroke, leaving the looper thread loop uponthe loop retainer 38. As soon as the looper point in.

its backward movement passes the needle path and the loop retainer, theneedle'loop taken by said looper on its'forward stroke is shed ordropped, and the needle in completing its upstroke draws said needleloop up close to the work, finishing thestitch.- It will thus be seenthat-.1 have provided a .cliain stitch sewing machine, including athreaded looper,=which operates to form a sga.

615 in its final pull upon the needle thread to chain stitch and topractically finish the stitch on the up stroke of the needle.

aIn my device, where the stitch is'formed andpractically finished-0n theup stroke ofthe needle, it will be noted that the needle set the stitch,is pulling the thread directly up through the needle puncture in thematerial, and, therefore, I am enabled to draw the stitch very tight. Asa matter of fact, by my stitch-forming mechanism, I am enabled todrawthe looper thread practically to the upper side of the material; ifdesired.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is Y 1. A sewing machine including incombination, a needle, means for reciprocating said needle, a worksupport, a looper beneaththe work support, means for moving said looperinto theneedle loop, laterally while in the needle loop and forretracting the same out of the needle loop on the upward movement, ofthe needle, a loop retainer, and means for moving said loop retainerinto the looper thread loop prior to the shedding of the needle loopfrom the looper.

2. A sewing machine including in combination, a work support, feedingmechanism, a needle means for reciprocating the needle,a loopercooperating with saidneedle beneath the work support and moving in aplane substantially at right angles to the line of feed, means formoving the looper into the needle loop and out of the needle loop on theupward movement of the needle, a loop retainer; and means for moving theloop retainer into the'lo'op'er thread loop prior to the shedding of theneedle loop from the looper and for causing said loop retainer to dwellto hold the looper thread loop beneath the work support for the'entranceof the needle.

3. A sewing machine including in combination, a work support, a feedingmechanism, a needle, means for reciprocating the needle, a loopercoeperating with said needle beneath the work support and moving in .aplane substantially at right angles to the 'line of feed, means formoving said looper into the needle loop and laterally while 1n the.needle loop and then retracting the looper out of the needle loop onthe upwardv movement of the needle, a loop retainer, and means formoving said loop'- retainer into the looperv thread loop prior' to theshedding of the needle loop from the looper.

4. A. sewing machine including in combination, a work-support, afeedingmechanism, a needle, means for reciprocating the needle, a loopercooperating with the nee dle beneath the work support and moving ina'plane substantially at right angles to the line of feed, means forreciprocating-said looper into the needle loop and for moving the looperlaterally and then retracting the looperfrom .the needle loop on theupward movement of the needle, 2. loop retainer moving in aplaneinclined to the path of movement of thelooper, and means for moving saidloop retainer into thelooper thread loop prior to the shedding of theneedle loop from the looper.

5. The combination with a needle, a looper, a thread retainer, means formoving said thread retainer into the'looper thread loop and for movingsaid looper out of the needle loop on the upward stroke of the needle,and means for adjusting the throw of the looper.

- 6. The combination with a needle, a looper, a thread retainer,cooperating with the needle beneath the material, a support therefor, ayoke pivoted to-the bed plate of the machine, a rotary shaft, a camcarried by said shaft for operating said yoke, and means for connectingsaid yoke to said, re-

tainer for oscillating the same on its support.

7. The combination with a' needle, a

looper, a main shaft, a rock arm connected the needle is on its upwardstroke and said looper is given a dwell at the rear end of its strokeduring substantially the entire downward movement of the needle.

8. A sewing machine'including in combination, a work support, a needle,means for reciprocating the needle, a looper, a looper arm on which saidlooper is mounted, means for oscillating said arm in a directionsubstantially at right angles to'the line of feed, means for swingingsaid arm laterally while the looper is at the forward end of its stroke,a loop retainer mounted for movement into the looper thread loop, an armon which said loop retainer is mounted, means for pivotally supportingsaid arm for the loop retainer, whereby said arm swings in a planeinclined to the plane of move ment of the looper-supporting arm, andmeans for oscillating said loop retainer arm.

In testimony whereof I afiix my signature, in presence of two witnesses.

LANSING ONDERDONK. Witnesses:

WALTER HARTLEY, FRANKLIN H. CHruroN.

